Harley-Davidson are pretty good at
building "tunable" engines—they've been doing it for over 90
years. This Twin Cam is as "new" an engine as Harley have
built in the last half-century, and its design is ideally suited to
performance modifications.

Despite its improved
combustion chamber design, the Twin Cam can still benefit from our Dual
Plugging process. And speaking of cams, we have a replacement Cam Kit
that will significantly increase power without losing that all-important
low-end torque. (See my "Fun to Ride Guide"
article.)

For a dramatic power
increase without parts replacement, our Super Port Flow process gives
great results on the Twin Cam.

Our replacement valve
springs will reduce friction and heat buildup. Like our valves and
pushrods, they're hand made from the highest quality materials.

CNC Port Flow
with Tool Finish

For
better breathing, you might also want to consider upgrading the Twin
Cam's carb to one of our blueprinted Keihins with low-restriction air
filter.